| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| Q3SZI5 | Mitochondrial uncoupling protein 2; UCP 2; Solute carrier family 25 member 8; | UCP2; SLC25A8; | NP_001028783.1; | 309 | cow |
| O77792 | Mitochondrial uncoupling protein 3; UCP 3; Solute carrier family 25 member 9; | UCP3; SLC25A9; | NP_776635.1; | 311 | cow |
| P13272 | Cytochrome b-c1 complex subunit Rieske, mitochondrial; EC 1.10.2.2; Complex III subunit 5; Cytochrome b-c1 complex subunit 5; Rieske iron-sulfur protein; RISP; Ubiquinol-cytochrome c reductase iron-sulfur subunit; [Cleaved into: Cytochrome b-c1 complex su癷?癸 | UQCRFS1; | NP_777238.1; | 274 | cow |
| Q1LZI1 | UDP-glucuronosyltransferase 3A1; UDPGT 3A1; EC 2.4.1.17; | UGT3A1; | NP_001069555.1; | 523 | cow |
| Q5E953 | Ubiquitin-fold modifier-conjugating enzyme 1; Ufm1-conjugating enzyme 1; | UFC1; | NP_001015663.1;XP_005203587.1;XP_005203588.1;XP_005203589.1; | 167 | cow |
| A1A4I9 | E3 UFM1-protein ligase 1; EC 6.3.2.-; | UFL1; | NP_001073745.1; | 792 | cow |
| Q2KJG2 | Ubiquitin-fold modifier 1; | UFM1; | NP_001039779.1; | 85 | cow |
| P12378 | UDP-glucose 6-dehydrogenase; UDP-Glc dehydrogenase; UDP-GlcDH; UDPGDH; EC 1.1.1.22; | UGDH; | NP_776636.1;XP_005207890.1; | 494 | cow |
| Q07130 | UTP--glucose-1-phosphate uridylyltransferase; EC 2.7.7.9; UDP-glucose pyrophosphorylase; UDPGP; UGPase; | UGP2; | NP_776637.1; | 508 | cow |
| A7E320 | E3 ubiquitin-protein ligase UHRF1; EC 6.3.2.-; Ubiquitin-like PHD and RING finger domain-containing protein 1; Ubiquitin-like-containing PHD and RING finger domains protein 1; | UHRF1; | NP_001096568.1; | 786 | cow |
| Q17QU6 | UAP56-interacting factor; Forty-two-three domain-containing protein 1; Protein 40-2-3; | FYTTD1; UIF; | NP_001001137.1; | 318 | cow |
| Q3T114 | Ribonuclease UK114; EC 3.1.-.-; | HRSP12; | NP_001029380.1; | 137 | cow |
| P31754 | Uridine 5'-monophosphate synthase; UMP synthase; OMPdecase; EC 2.4.2.10; EC 4.1.1.23; OPRTase; | UMPS; | NP_803474.1; | 480 | cow |
| A2VE54 | Protein unc-93 homolog A; Unc-93A; | UNC93A; | NP_001075926.1; | 457 | cow |
| Q3ZBG6 | Protein unc-50 homolog; | UNC50; | NP_001014921.1;XP_005212370.1;XP_005212371.1;XP_005212372.1; | 259 | cow |
| Q05588 | Urokinase plasminogen activator surface receptor; U-PAR; uPAR; CD antigen CD87; | PLAUR; | NP_776848.1; | 330 | cow |
| P38572 | Uroplakin-1a; UP1a; Uroplakin Ia; UPIa; | UPK1A; | NP_788784.1; | 258 | cow |
| P38573 | Uroplakin-1b; UP1b; Uroplakin Ib; UPIb; | UPK1B; | NP_776907.2;XP_005201317.1;XP_005201318.1; | 260 | cow |
| Q08537 | Uroplakin-2; UP2; Uroplakin II; UPII; | UPK2; | NP_776639.1;XP_005215952.1;XP_005215953.1;XP_005215954.1; | 185 | cow |
| P38574 | Uroplakin-3a; UP3a; Uroplakin III; UPIII; | UPK3A; UPK3; | NP_777134.1; | 287 | cow |
